Intermittent commit to get screen capture.
Updated screens & text for contributing changes; deleted unused graphics and added alternative text to
newer graphics; edited site-wide installation section.
Merge pull request #1440 from crobinsonut/dev

last_saved_metadata no longer calls logout.
Merge pull request #1441 from pziegfeld/sept_cleanup

Sept cleanup - removed old images, added alt.text  for graphics, updated screens for contributing code, minor edits.
Corrected autocompletion for adding parameters. Added functional test to verify.
gui bug fixes
add explicit default precision for WV shaders
handle zmq message after websocket is closed in ZMQStreamServer
add try/except handling to project import handler
Merge pull request #1442 from crobinsonut/fix-parameters-autocomplete

Fixed autocomplete when adding parameters
In dev-guide, fixed bad link to Xcode downloads.
Merge pull request #1443 from pziegfeld/xcode_link

In dev-guide, fixed bad link to Xcode downloads.
re-disable view_csm test on pangolin
Merge branch 'dev' into gui
fix problem with multiple ws_closed dialogs at same time during gui testing
misc gui test tweaks and PEP cleanup
Merge pull request #1446 from swryan/gui

gui - bug and test fixes
fixed circular import
Merge pull request #1447 from naylor-b/circular_import

fixed circular import